RV4000 -> Secure Computing SG580 L2TP

I have a central office (HQ) and a remote ofice (TAC). I need the TAC to connect to the HQ via L2TP, and be able to use it's resources, and for HQ to use TAC's resources.

To clarify: The RV4000 is setup to initiate the connection to the SG580. This part seems to be working correctly. I *think* this may be a routing issue, however, I am a Linux Admin not a network engineer. Any help is greatly appreciated.

HQ(SG580):
2 internet connections
INET1: Hi BW Corporate conection for day to day traffic and use.
INET2: T1 to allow TAC to conect to HQ.

HQ Network
192.168.0.0/16 GW 192.168.0.1 (this GW has a static route to send all 192.168.3.0/24 traffic to 192.168.1.245)
192.168.1.245/32 (This is the SG580 acting as an L2TP server)

TAC(RV4000):
2 internet connections
INET1: Hi BW Corporate conection for day to day traffic and use.
INET2: T1 to allow TAC to conect to HQ.

TAC Network
NETWORK 1 is on another batch of internal IP's
192.168.3.0/24 GW 192.168.3.1 (this network has a few machines that we need access to, and that need to access HQ)

The tunnel comes up, I can see it in the logs, however, I cannot ping it.